of law enforcement to combat scamsment what are some of the difficulties or obstacles you or your agents have seen in combating. >> it's been mentioned panel after panel this morning, it's a global problem. so anytime we're trying to conduct a criminal investigation, where the criminals are located overseas, it makes it that much more difficult to run the investigation. we rely on collaborating with other law enforcement agencies, and we rely on collaborating with other law enforcement and regulatory components of foreign governments in addition, fda is a public health and state enforcement engine, and to conduct a criminal investigation involving a public health and safety matter, where the public needs to be warned, it makes it very difficult at times to conduct a criminal investigation, because once an alert goes out, notifying the public of another tainted supplement, the hat is tipped. but it's the right thing to do. >> there may be viewers out there, consumers, saying to themselves, look, i have a disease that i'm suffering from, and i need something that is going to cure me. they'